Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28f9b4185601f7c…

MALICIOUS

PDF

62.8 KB Created: 2021-02-14 14:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4378b21d0b9bfccc9bcdfc993158dd21 SHA-1: ea9edc23e0190abbc1e3e4ec1a0816923180c34a SHA-256: d28f9b4185601f7c1f6142deb3ca14c5b7aa7ca13f331ef5a7ab3e896ddad0f8
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/wb?keyword=cancer%20epigenetics%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366302/normal_5ffdb9987055a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392444/normal_5ffb43e134650.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454056/normal_5ff90194f01d2.pdfIn PDF document text
    • https://xopozutafedas.weebly.com/uploads/1/3/1/4/131453480/c1afd.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/ifOyXhj/chemical_element_ag_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_6014717eac938.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/fihjdja/wheels_on_the_bus_melanie_martinez_clean_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494140/normal_5fd79f58dde1d.pdfIn PDF document text
    • http://mitutazulew.22web.org/audit_report_of_infosys_company.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/5hdiihg/dama_italiana_online_gratis_contro_computer.pdfIn PDF document text
    • http://gozatelaji.22web.org/free_loft_bed_plans.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/monthly_schedule_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/nefutogutonetikemid.pdfIn PDF document text
    • http://lakiver.epizy.com/businessman_telugu_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/catholic_social_teachings.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD17 5196 bytes
SHA-256: f7a8f5826a469c7bf35af84223f74439c418f081e0b242a973dd344f916eff02
font_01_sfnt_off0000cecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECD 9344 bytes
SHA-256: 860af4e2ff3a625b335d03d469b488e1a78511a54a82b56e6b8505a60eef2fa1